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At its core, a Sierra Pattern challenges a pilot to execute sequential, highly structured changes in altitude, heading, and configuration within precise timeframes.
, it is typically practiced during initial type rating or simulator training to help pilots internalize the specific Pitch and Thrust sierra pattern a320
: Clean up the aircraft and return to level flight, emphasizing smooth power application and pitch control to prevent altitude busts Why "Sierra"?
: Maintaining altitude and speed during high-bank maneuvers. Performance Standards This public link is valid for 7 days
In a commercial environment, pilots rely on "Managed Speed," where the Flight Management Guidance Computer (FMGC) calculates optimal velocities. In a Sierra Pattern, the pilot shifts to by pulling the speed knob on the Flight Control Unit (FCU). This manually forces the autothrust system to aggressively reduce power, allowing the pilot to force the aircraft down and slow it down simultaneously without triggering automated low-speed protection profiles prematurely. Tactical Advantages of the Sierra Pattern Description Reduced Vulnerability
In Normal Law, the A320 maintains a G-load demand. When the pilot releases the sidestick, the aircraft maintains its flight path vector, automatically adjusting for speed changes. This means pilots do not need to manually trim the aircraft during the Sierra Pattern's frequent speed and configuration transitions—a major departure from conventional aircraft like the Boeing 737. Auto-Thrust (A-THR) Dynamics Can’t copy the link right now
When a pilot decides to abort a landing (Go-Around), they press the (Take-Off/Go-Around) switch on the thrust levers. This triggers a pre-programmed sequence: The aircraft automatically changes from Approach Law to Normal Law, the thrust levers advance to the Go-Around detent, and the Flight Director (FD) displays a specific pitch attitude target (usually 15 degrees nose up).
The procedure is more than a list of heading changes; it is a disciplined mindset. It acknowledges that a go-around is not a failure—it is a planned, trained phase of flight.